Hello:
There is a cavity 8874 amp for 432 in several editions of W6SAIs RADIO
HANDBOOK. I guess, and it is only a guess, you could use the 3CX800A7 as
well possibly with reduced data. There is, however, a coaxial version of
this tube that can be used easily up to 900 MHZ.
There has been a watercooled 2C39 1296 amp in ARRL:S handbook.
One good source for experimenters with a lot of info on amps, antennas etc
is the UHF-COMPENDIUM by K. Weiner DJ8HO sold by the German amateur radio
socity DARC. The Brittish RSGB ( ask G3SEK Ian on this net ) and ARRL have
several books on the subject.
Comes to my mind I have a number new tubes in cartoons in my junk box; 2C39s
and the little RCA 7844 cermolox tube, a tetrode, that can deliver 40 watts/
class C/ CCS / 1215 MHZ and 80 watts on 400 MHz. Eventually for sale or swap
for linear tubes for the short wave bands.
Gd luck es 73s de Hans SM5KI
----------
>Från: "Joseph Rodgers" <jarodger@airmail.net>
>Till: <amps@contesting.com>
>Ämne: [AMPS] Cavity Amp designs for 432 Mhz and 1200 Mhz??
>Datum: fre 18 feb 2000 06.05
>
>
>Hi,
>
>I have been looking around for some design data on cavity amps for 432 and
>1296 Mhz. I have not been able to find very much information though. There
>have been a couple of designs in the ARRL handbooks, but not a lot. Is there
>somewhere else I should look?
>
>I want to build an amp using a tetrode (4CX250 family) amp for 432, or one
>for 1296 using the 2C39 or 3CX100A5. One or two tubes for either.
>
>Anyone got some information they could pass one, or point me in a direction?
>
>Thanks
>Joe
>N5WY
>
>
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